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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryReal EstateCleaning companyAltstätten SgSIAX GmbH
SIAX GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of SIAX Spezialreinigungen GmbH is the execution of specialized cleaning services, in particular: facade cleaning (plaster, Eternit, concrete, metal), window cleaning, shutter cleaning, roof cleaning, solar/photovoltaic cleaning, sidewalk slab cleaning, and concrete cleaning and hydrophobization. The company offers these services for various object sizes (small objects such as single-family homes and large objects such as industrial buildings) in different regions of Switzerland and in Liechtenstein.

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Service area

Offering

Products & services

Industry:Cleaning company
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4.2/5

SIAX GmbH

✓ Offered7
Window cleaning
Cleaning of glass, apartment windows, glass façades, conservatories and shop windows; on request, interior and exterior glass cleaning, glass and frame cleaning, including blinds or slats.
Facade cleaning
Cleaning of render, Eternit, concrete and metal façades; removal of algae, lichen, moss and soiling, including dirty-water collection and optional long-term protection.
Roller shutter cleaning
Cleaning of storen on site, inside and outside; removal of pollen, bird droppings, dust and nicotine with special equipment and pure water.
Roof cleaning
Cleaning of roofs and roof tiles; removal of moss, algae, leaves and soiling using cleaning agents and low- or high-pressure.
Solar cleaning / Photovoltaic cleaning
Cleaning of solar systems and photovoltaic systems with pure water or osmosis water; removal of dirt, lime deposits, bird droppings, leaves and moss.
Walkway slab cleaning
Cleaning of walkway slabs, paving stones, concrete slabs and natural stone slabs with pressure cleaner, brush or floor scrubber; optional filling of joints.
Concrete cleaning / Hydrophobing
Cleaning of concrete surfaces and concrete façades of green growth and soiling, followed by hydrophobing as a water-repellent surface protection.
Trust & reputation

ranQ Trust Score of SIAX GmbH: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of November 2026

SIAX GmbH scores 85.2 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.89.424%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.80.810%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.78.08%
SIAX GmbH scores 67.8 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.64.612%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.55.07%
SIAX GmbH scores 86.7 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).86.722%
SIAX GmbH scores 0.9 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.0.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

SIAX GmbH reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 23 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 23 reviews across all connected sources

Sources
GGoogle523
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Oberrieterstrasse 55
9450 Altstätten Sg
Opening hours
Mon
08:30 - 11:45
Tue
08:30 - 11:45, 14:00 - 17:00
Wed
08:30 - 11:45
Thu
08:30 - 11:45, 14:00 - 17:00
Fri
08:30 - 11:45, 14:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-265.185.041
Founded
2021 · 5 years
Last commercial register change
February 18, 2025
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SGAltstätten
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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